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USB to Serial Adapter -TunerStudio

4.58 out of 5 based on 12 customer ratings
(12 customer reviews )


In stock


This USB to Serial Adapter has been tested and works properly with all versions of TunerStudio.  We highly recommend this adapter is used if your tuning PC/laptop doesn’t have a DB9 Serial connector.  Or you can use another adapter with a genuine FTDI chipset (which this uses).

This adapter includes a 2′ extension cable, but we only recommend using the extension cable if you have vibration issues with the adapter plugged directly into your laptop. USB cable runs are more susceptible to noise than RS232, so we recommend using our standard 6′ tuning cable in combination with this adapter.

Product SKU: USB-2920

Customers' review

Rated 4.58 out of 5 stars
12 reviews

9 reviews with rating of 5 stars (9 of 12)

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12 reviews for USB to Serial Adapter -TunerStudio

  1. 5 out of 5

    No Headache!If you search long and hard, and you are willing to wait for 6 weeks for a inferior cable to arrive from China, you could save maybe 10 dollars.
    How much of a headache you want for 10 dollars? This cable is guaranteed to work with Tuner Studio and your Megasquirt. Guaranteed no headache. :-)
    My advise: look no further. Get this cable and stay out of trouble.

    Was this review helpful to you? 2 of 2 people found this review helpful

  2. 3 out of 5

    No proper instructions, need helpI just bought this expecting to get my car up and running. It came with a cd and there is no actual instructions. I tried hooking it up to tuner studios but it doesn't read. I probably don't know but i could use some help. It has a windows 7 installation but im sure lots of people have windows 10...please send help.

    Was this review helpful to you? 5 of 6 people found this review helpful

  3. 5 out of 5

    Does what it's suppose toi have no problem with it's function just don't understand why serial is even on the computer is there anything has that plug anymore? everything has usb so it would be great is it had a usb plug in the first place but it works well and i've been tuning with it for a while now.

    Was this review helpful to you? 1 of 1 people found this review helpful

  4. 5 out of 5

    USB to Serial AdapterAfter the headache of messing around with generic adapters in the past and hit and miss connections, I was a little skeptical of the DIY Autotune claims. I needed a new adapter for a customer install and tune so I ordered one and surprisingly received it in 3 days. I installed the disc, fired up the Megasquirt and instant hookup at the required 9600 baud rate. Absolutely perfect! This one works exactly as they claim. Regards, Mac

    Was this review helpful to you? 1 of 1 people found this review helpful

  5. 4 out of 5

    works well but the supplied usb cord was too short for comfort with my nb1 miata

    Was this review helpful to you? 1 of 1 people found this review helpful

  6. 3 out of 5

    Connects right up and communicates great with the engine off. Immediately loses communication once the engine starts. See

    Was this review helpful to you? 3 of 4 people found this review helpful

  7. 5 out of 5

    super fast shipping, installed painlessly (win7 literally was plug n play) also it does NOT need the DB9 straight though serial cable to use it (I had a USB to Serial adapter that did require it)... so nice bonus.

    Was this review helpful to you? 1 of 1 people found this review helpful

  8. 5 out of 5

    Very fast international shipping and works perfectly in Windows 7 using the driver supplied on the product page.

    Was this review helpful to you? 1 of 1 people found this review helpful

  9. 5 out of 5

    Worked perfectly first time - driver install was painless, and connection to the MSPNP has been 100% solid.

    Was this review helpful to you? 1 of 1 people found this review helpful

  10. 5 out of 5

    This one also work with OS X. (10.4.x)

    Just install the driver, and you find it on /dev/tty.usbserial-FTCW40A8

    Was this review helpful to you? 0 of 0 people found this review helpful

  11. 5 out of 5

    This worked flawlessly and connects directly to the megasquirt. I highly recommend this adapter. no need to mess with internal usb adapters. Still allows for use of megaview if you choose.

    Was this review helpful to you? 1 of 1 people found this review helpful

  12. 5 out of 5

    Not only was this shipped extra quickly, it works just as promised and more.

    Was this review helpful to you? 1 of 1 people found this review helpful

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Drivers for this adapter can be found on the FTDI website.

Am I required to use this particular adapter for connecting to MegaSquirt?

  • It is not the only adapter that can work, but our tech department is very familiar with this adapter and it is the only adapter we can provide full technical and warranty support for. With this adapter, you can talk to a support team who both knows the USB adapter and knows MegaSquirt fully.

When should I use the USB extension cable included with this unit?

  • The cable is useful if you are dealing with a high vibration environment. However, it also picks up large amounts of electrical noise. If you are using the USB extension cable and experience problems where the ECU goes offline once you start the engine, remove the extension cable and plug the adapter directly into the USB extension port, and use the DB9 straight through cable to connect the adapter to the ECU.

Why would I get less noise with the DB9 extension than with the USB extension?

  • The RS232 side of the system uses a +12 to -12 volt swing to send a signal. USB communications use a 0.0 to 0.3 volt signal. With a larger amount of signal and the same amount of noise, RS232 has a much better signal to noise ratio than USB in the same environment.

What chipset does this adapter use?

  • It uses an FTDI USB to RS232 converter chipset.

Where can I download the latest driver version for this adapter?

Questions & Answers

  1. 0 votes

    You can download the driver as a self installing executable

    This device does not have USB 3.0 capabilities.

  2. 0 votes

    TunerStudio does not support IOS. For a display app, you could use RealDash, which would connect over WiFi with a suitable WiFi to RS232 adapter.

  3. 0 votes

    It should work if it has a FTDI chipset, and will probably work if it has a Prolific chipset. Some other chipsets like the CH340 are more problematic. We would not be able to provide technical support for diagnosing problems that appear to be caused by the Insignia adapter if any arise; you would need to contact Insignia's technical support if you run into driver issues or similar problems.

  4. 0 votes

    Yes. We use them for this combination all the time at our shop.

  5. 0 votes

    Please try downloading and running the latest Windows driver, and see if that fixes it. We are using these on Windows 10 computers at our shop without any trouble.